def main():
    try:
        face3 = "sdfAFA"
        #face = [21,11,14,11,11]
        #face2 = [22,33]
        #print(",".join(map(str,face)))
        #face.append(45,33)
        #print(",".join(map(str,face)))
        #print(face.count(11))
        #face.extend(face2)
        #print(",".join(map(str,face)))
        print(face3.index('F'))
        face3 = face3.remove("F")
        print(face3)
    except:
        print("Error")
            
if __name__ == "__main__":
    main()